Novel fluoroelastomer film compositions containing silane compounds and method for the preparation thereof

A method for adhering fluoroelastomer film compositions, devoid of metallic oxides, to substrates comprising the steps of:

• dissolving a fluoroelastomer gum in a solvent;
• and
• adding a silane compound to said gum solution said silane compound having the formula RCH.sub.2 CH.sub.2 CH.sub.2 SiR'.sub.3-n (OR").sub.n, where R is an organofunctional group selected from the group consisting of amine and epoxy molecules;
• R' is a simple alkyl group having about one to five carbon atoms;
• OR" is a hydrolyzable alkoxy group, R" being an alkyl group having about one to four carbon atoms and n is 1, 2 or 3;
• coating said substrate with said fluoroelastomer gum-silane solution;
• and
• evaporating said solvent and leaving a film firmly adhered to said substrate.

A novel fluoroelastomer film composition comprising:

• a fluoroelastomer gum;
• and
• a silane compound having the formula RCH.sub.2 CH.sub.2 CH.sub.2 SiR'.sub.3-n (OR").sub.n, where R is an organofunctional group selected from the group consisting of amine and epoxy molecules;
• R' is a simple alkyl group having about one to five carbon atoms;
• OR" is a hydrolyzable alkoxy group, R" being an alkyl group having about one to four carbon atoms and n is 1, 2 or 3.

A novel fluoroelastomer solution comprising:

• a fluoroelastomer gum;
• a silane compound having the formula RCH.sub.2 CH.sub.2 CH.sub.2 SiR'.sub.3-n (OR").sub.n, where R is an organofunctional group selected from the group consisting of amine and epoxy molecules;
• R' is a simple alkyl group having about one to five carbon atoms;
• OR" is a hydrolyzable alkoxy group, R" being an alkyl group having about one to four carbon atoms and n is 1, 2 or 3;
• and
• a solvent for said fluoroelastomer and gum solution.